Spectacles



Feb. 15, 1938.

E. McMAHON I 2,108,074

SPECTACLES Filed Oct. 26, 1955 INVEhiTOR EMA/e0 1. MC MAHO/V ATTORNEY Patented Feb. 15, 1938 UNITED STATES PATENT OFFICE 4 Claims.

(Cl. 8H1) (Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 157) This inventionrelates to spectacles and, although applicable to spectacles having magn fying characteristics employedas an aid to the vision, it has particular relation to goggles used by mechanics and other artisans as a protection against dust and other flying particles.

One of the objects of the present invention is the provision of goggles of the character described, having eye cups which may be adjusted rotatably and also toward and away from one another, in order to conform to the facial contour .of the wearer.

Another object of theinvention is the provision of goggles having head engaging bow members which are so constructed and assembled as to afford a yieldable multipoint contact with the head so as not only to distribute the pressure exerted by the bow members but to .brace the goggles as against lateral tilting.

With these and other objects in view, as well as other advantages which may be incident to the use of the improvements, the invention consists of the parts and combinations thereof here- .inafter set forth and claimed, with the understanding that the several necessary elements constituting the same may be varied in proportion and arrangement without departing from the nature and scope of the invention, as defined in the appended claims.

In order to make the invention more clearly understood, there are shown in the accompanying drawing means for carrying the invention into practical effect, without limiting the improvements in their useful application to the particular construction, which, for purposes of explanation, have been made the subject of illustration.

In the accompanying drawing:

Fig. 1 is a plan view of a pair of goggles con- :tructed in accordance with the present invenion;

Fig. 2 is a side elevational view of the structure shown in Fig. 1;

Fig. 3 is a front elevational view of the improved goggles;

Fig. 4 is a fragmentary, vertical, sectional view taken on line |--4 of Fig. 1, but on a larger scale, and

Fig. 5 is a detailed view of the leaf spring construction for imparting flexibility to the head engaging bow members.

Referring to the drawing, a pair of goggles embodying the present invention is shown as com-,

prising two annular members l0 connected with one another by upper and lower bridge members II and I2, respectively, in the form of spring straps. The upper bridge member I I is secured at its ends in any preferred manner such as by brazing or riveting to the outer circumferential area of the annular members l0, whereas the lower bridge member I2 is suitably secured to the inner circumferential area of the annular members, but in vertically spaced relation with respect to the upper member ll.

- The annular members l0 are each formed with a plurality of circumferentially arranged rearwardly extending spaced spring fingers or clips l3, adapted to engage and frictionally retain the usual eye cups l4 provided with lenses l5 and side guards Hi. 'It will be understood that although the lenses l5 are shown as having zero curvature, the invention is also applicable to lenses having magnifying properties. The spring fingers l3 are of suflicient strength to maintain the eye cups l4 a ainst accidental displacement and yet permit of their rotation therein, so as to accommodate the side guards It to the facial contour of the wearer.

The bridge members H and I2 are connected with one another at an intermediate point by means of a screw l'l (Fig. 3) which is fixed in the lower bridge member I! for screw threaded engagement by a thumb nut l8, which is rotatably mounted in the upper bridge member I l but maintained against axial movement therein. When the thumb nut I8 is turned in one direction the screw i1 and the nut will be drawn together, thereby flexing the spring bridge members H and I2 toward one another and drawing the annular members l0 and eye cups l4 inwardly in an obvious manner to shorten the distance between the optical centers of the lenses IS. on the other hand, if the thumb nut I8 is turned in an opposite direction the spring bridge members H and I! will be flexed away from one another and force the annular members and eye cups I4 apart, thus increasing the distance between the optical centers of the lenses l5.

A pair of spring wires or clips it are secured at their upper ends only to the circumferences of the annular members l0 adjacent to the space therebetween and constitute the support for a pair of tubular padding members or cushions 20, which are slipped thereon for contact with the nose of the wearer.- The distance between these padding members may be also varied by means of the thumb nut l8, in order to provide a comfortable flt.

The goggles are also provided with rearwardly extending spring bow members 2| which are hinged as at 22 intermediate their-ends so as to permit them to be folded inwardly when not in use. Supplemental springs 23 may be employed adjacent to the hinges 22 so as to prevent the bow members from swinging outwardly an excessive distance in the event they are freely pivoted. These springs, however, may be dispensed with if the hinges 22 are provided with shoulders which abut at a predetermined point, so as to limit the outward swinging movement of the bow members.

The rear portions of the bow members 2| are bifurcated to provide diverging branches 24, each provided with a tubular padding or cushion 25, for contact with the head. This particular construction is desirable for the reason that it not only distributes the pressure of the spring bow members upon the head but maintains the goggles as against lateral tilting. If desired, the bow members 2| may be provided with leaf spring inserts '26 (Fig. 5), in the event the bow members are relatively rigid and it is not desired to have them foldable. Also, the nut I8 may be fixed to either of the members I! or I 2 and the screw I! provided with a suitable manipulating head and rotatably mounted in the other of said members.

Other modifications and changes in proportions and arrangement of the parts may be made by those skilled in the art without departing from the nature and scope of the invention, as defined in the appended claims.

The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.

What is claimed is:

1. Spectacles comprising a pair of lenses, a pair 01' vertically spaced bridge members connecting said lenses, a screw element carried by one of said bridge members, and a nut element carried by the other of said bridge members for threaded engagement with said screw element, said elements being relatively rotatable to vary the spacing of said bridge members and hence the distance between said lenses.

2. Spectacles comprising a pair of lenses, a pair of vertically spaced bridge members connecting said lenses, a screw fixed to one of said members, and a nut mounted in the other of said members for threaded engagement with said screw, said nut being rotatable to vary the spacing of said bridge members and hence the distance between said lenses.

3. Spectacles comprising a pair of lenses, a pair of vertically spaced spring bridge members connecting said lenses, a screw fixed to one of said membera and a nut carried by the other of said members for threaded engagement with said screw, said nut being rotatable to flex said spring bridge members toward and away from one another, thus to vary the distance between said lenses.

4. Spectacles comprising a frame including a pair of annular members, each having a plurality of circumferentially arranged spring clips, and a pair of eye cups mounted in said annular members and maintained therein by said spring clips, said eye cups being rotatableagainst the friction of said spring clips to conform to the facial contour of the wearer.

EDWARD F. MCMAHON.' 

